<template>
    <view class="filter-wrapper" :style="{ height: height + 'rpx', top: top,'border-top':border?'1rpx solid #f2f2f2':'none' }" @touchmove.stop.prevent="discard">
        <view class="inner-wrapper">
            <view class="mask" :class="showMask ? 'show' : 'hide'" @tap="tapMask"></view>
            <view class="navs">
                <view class="c-flex-align c-flex-center" :class="{ 'c-flex-center': index > 0, actNav: index === actNav }" v-for="(item, index) in navData" :key="index" @click="navClick(index)">
                    <view v-for="(child, childx) in item" :key="childx" v-if="child.select">{{ child.text }}</view>
                    <image src="https://i.loli.net/2020/07/15/QsHxlr1gbSImvWt.png" mode="" class="icon-triangle" v-if="index === actNav"></image>
                    <image src="https://i.loli.net/2020/07/15/xjVSvzWcH9NO7al.png" mode="" class="icon-triangle" v-else></image>
                </view>

       
            </view>
            <scroll-view scroll-y="true" class="popup" :class="popupShow ? 'popupShow' : ''">
                <view class="item-opt c-flex-align" :class="item.select ? 'actOpt' : ''" v-for="(item, index) in navData[actNav]" :key="index" @click="handleOpt(index)">
                    {{ item.text }}
                </view>
            </scroll-view>
        </view>
    </view>
</template>

<script>
// import { getCurDateTime } from '@/libs/utils.js';
export default {
    props: {
        height: {
            type: Number,
            default: 100
        },
        top: {
            type: String,
            default: 'calc(var(--window-statsu-bar) + 44px)'
        },
        border: {
            type: Boolean,
            default: false
        },
        filterData: {
            //必填
            type: Array,
            default: () => {
                return [];
            }
      
        },
        defaultIndex: {
            //默认选中条件索引,超出一类时必填
            type: Array,
            default: () => {
                return [0];
            }
        }
    },
    data() {
        return {
            navData: [],
            popupShow: false,
            showMask: false,
            actNav: null,
            selDate: '选择日期',
            selIndex: [] //选中条件索引
        };
    },
    created() {
        this.navData = this.filterData;
        this.selIndex = this.defaultIndex;
        this.keepStatus();
    },
    mounted() {
        // this.selDate = getCurDateTime().formatDate;
    },
    methods: {
        keepStatus() {
            this.navData.forEach(itemnavData => {
                itemnavData.map(child => {
                    child.select = false;
                });
                return itemnavData;
            });
            for (let i = 0; i < this.selIndex.length; i++) {
                let selindex = this.selIndex[i];
                this.navData[i][selindex].select = true;
            }
        },
        navClick(index) {
            if (index === this.actNav) {
                this.tapMask();
                return;
            }
            this.popupShow = true;
            this.showMask = true;
            this.actNav = index;
        },
        handleOpt(index) {
            this.selIndex[this.actNav] = index;
            this.keepStatus();
            setTimeout(() => {
                this.tapMask();
            }, 100);
            let data = [];
            let res = this.navData.forEach(item => {
                let sel = item.filter(child => child.select);
                data.push(sel);
            });
            console.log(data);
            this.$emit('onSelected', data);
        },
        dateClick() {
            this.tapMask();
        },
        tapMask() {
            this.showMask = false;
            this.popupShow = false;
            this.actNav = null;
        },
        handleDate(e) {
            let d = e.detail.value;
            this.selDate = d;
            this.$emit('dateChange', d);
        },
        discard() {}
    }
};
</script>

<style lang="scss" scoped>
page {
    font-size: 28rpx;
}
.c-flex-align {
    display: flex;
    align-items: center;
}
.c-flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}
.filter-wrapper {
    position: fixed;
    left: 0;
    width: 750rpx;
    z-index: 999;
    .inner-wrapper {
        // position: relative;
        .navs {
            position: relative;
            height: 100rpx;
            padding: 0 40rpx;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background-color: #fff;
            border-bottom: 2rpx solid #f5f6f9;
            color: #8b9aae;
            z-index: 999;
            box-sizing: border-box;
            & > view {
                flex: 1;
                height: 100%;
                flex-direction: row;
                z-index: 999;
            }
            .date {
                justify-content: flex-end;
            }
            .actNav {
                color: #4d7df9;
                font-weight: bold;
            }
        }
        .mask {
            z-index: 666;
            position: fixed;
            top: calc(var(--status-bar-height) + 44px);
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(0, 0, 0, 0);
            transition: background-color 0.15s linear;
            &.show {
                background-color: rgba(0, 0, 0, 0.4);
            }
            &.hide {
                display: none;
            }
        }
        .popup {
            position: relative;
            max-height: 500rpx;
            background-color: #fff;
            overflow: scroll;
            z-index: 999;
            transition: all 1s linear;
            opacity: 0;
            display: none;
            .item-opt {
                height: 90rpx;
                padding: 0 40rpx;
                color: #8b9aae;
                border-bottom: 2rpx solid #f5f6f9;
            }
            .actOpt {
                color: #4d7df9;
                font-weight: bold;
                position: relative;
                &::after {
                    content: '✓';
                    font-weight: bold;
                    font-size: 36rpx;
                    position: absolute;
                    right: 40rpx;
                }
            }
        }
        .popupShow {
            display: block;
            opacity: 1;
        }
    }

    .icon-triangle {
        width: 16rpx;
        height: 16rpx;
        margin-left: 10rpx;
    }
}
</style>
